Navigator might be better than Chancellor here. Also, I don't think that you don't need +Actions (or even +Buy) for this to be OK. If you have both, it seems unlikely that there isn't some better route to victory without one of those two. Chancellor also throws away the rest of your deck...
And yes, in this case, Apothecary is far superior to Scout. Most things are. Also, in this case, Province is far superior to Curse.